Please do post a vid if u can, mizzli. I'm curious myself as I am convinced I have a similar issue w/this trick (in spite of also being strong & plenty bendy, & understand the mechanics of the trick pretty well) but I would LOVE to be persuaded otherwise... So far, tho, the #s seem to be tell-tale... Pole-geek alert (skip the rest of this post if you hate math): do you know your "ape-factor" ? This is your wingspan-to-height ratio, common sports science stat of interest in basketball players, possibly athletes of other sports too (sorry this kind of thing has inevitably filtered into my brain with sports nut/nerd hubby by my side over so many years)... The theoretical perfect balance/proportion on a human is 1-1 (for sports like basketball, swimming, rowing, etc., higher ratio is better). Mine is on the low side, I forget the exact value, but it's definitely under 1, and I know I am "short" by about 1" (maybe a bit more) overall, so about 1/2" per side (in other words, I officially "technically" have short arms, LOL). This 1/2" difference might not sound like much but if you've come this far in pole then you've all had experiences learning different things where we get the powerful understanding that "every little bit counts". I am rather "tiny all around" too, albeit not quite as much so as Karol, given I'm quite a bit more hippy/leggy than she is (ironically warranting probably just that much "longer" of a shelf for *my* Janeiro whereas my arms don't even create the standard "minimum" size ... But I've also been around Karol (& watched her perform her Janeiro dozens of times) and I know she's got quite some limbs on her, hence I'm guessing she has a higher ape-factor. From time to time I test this on my students & other instructors, & it's interesting how the results are very telling, especially as the ape-factor tends to jive well with what moves that person tends to favor or just naturally excel at.
Anyway, check that on yourself (lying on the floor against a wall I think renders most accurate results) & please do report back -- I am very curious what your ape-factor is... I will try to get a video of my own Janeiro attempts to post here as well.